Thread-cutting device for shuttles.



1. P MOBISSETTE. THREAD CUTTING DEVICE FOR SHUTTLES.

APPLICATION FILED MAY 29. I916- Patented Feb. 19, 1918.

II'VVEI'VTOR. I

N x A m I N 3k Em wI 1 I m Q Q Q i m w JOSEPH P. MORISSETTE, OF HOLYOKE,MASSACHUSETTS.

THREAD-CUTTING DEVICE FOR SHUTTLES.

Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed May 29, 1916. Serial No. 100,466.

'1 '0 all whom it may concern Be it known that I, JOSEPH P. Momssn'r'rn,a subject of the King of England, residing at Holyoke, in the county ofHampden and State of Massachusetts, have invented a new and usefulThread-Cutting Device for Shuttles, of which the following is aspecification.

My invention relates to improvements in loom shuttles, and moreparticularly to cutting devices for such shuttles, or for the fillingthread carried thereby; and said invention consists essentially of amember located in the shuttle case behind the eye in such case, andpierced to admit of the passage of a substantially normal filling threadof a given size; a fixed knife or blade placed crosswise of said case,or substantially parallel with said member, and between the latter andsaid eye; and a tension device located between said member and saidblade, and arranged normally to cause the filling thread to travelthrough a course which is clear of said blade, but adapted, when saidthread is suddenly checked, as by the impact of a lump on the threadwith the aforesaid member, such lump being too large to pass through theopening therein, to yield and allow the thread to be drawn across saidblade and so severed, all as hereinafter set forth. 1

The primary object of my invention is to provide a shuttle with meansfor cutting the filling thread automatically, when said thread issubjected to an unusual strain, such means affording the necessarytension for the thread and permitting the same to feed freely from thebobbin so long as the 100111 is Working properly and there is noenlargement in the thread which would impair the goods.

As is well known, much damage is frequently caused to the goods by thepresence of what are known as lumps in the filling thread and whichenter into the goods. With this device the thread is severed before suchlumps have an opportunity to leave the shuttle. Small knots in thethread may be of no importance, since their presence in'the goods doesnot seriously impair either the texture or appearance thereof, buttangles and especially lumps in the thread are the source of seriousdamage to the goods, if permitted to get'into the same.

A further object is to produce a cutting device, for shuttles, that issimple in construction and operation, consists of few parts which arenot liable to get out of order even under the hard usage to which suchparts with the shuttle are usually subjected, and is inexpensive,convenient, reliable, and applicable to any ordinary shuttle.

Other objects and advantages will appear in the course of the followingdescription.

1 attain the objects and secure the advantages of my invention by themeans illustrated in the accompanying drawings, in Which Figure 1 is atop plan of a shuttle case containing a filling carrier or bobbin andequipped with a thread-cutting device which embodies a practical form ofmy invention; Fig. 2, a cross-section through said case, taken on lines2-2, looking in the direction of the associated arrow, in Fig. 1; Fig.3, a cross-section on lines 33, looking in the direction of theassociated arrow, Fig. 1; Fig. 4, a cross-section on lines 4-4, lookingin the direction of the associated arrow, Fig. 1; and, Fig. 5, a topplan in partial section of the new device and the supporting portiontherefor of said shuttle case, illustrating the manner in which thethread is severed.

Similar numerals of reference indicate corresponding parts throughoutthe several views.

In the drawings a shuttle case is represented at 1, and a fillingcarrier at 5 with filling thread 6 Wound thereon to form a bobbin. Atone end of the case 1 in one side thereof is an eye 7 having therein abushing 8. These parts and members are all old and Well known, bothstructurally and as to mode of operation. The thread leaves the case 1by way of the eye bushing 8, and is drawn off of the bobbin as theshuttle is shot back and forth through the shed of the loom. Thatportion of the thread that is unwound is indicated by the numeral 9, andis the portion most intimately associated with my invention.

therein,

' is able at least without A guide and stop member '10, which here is.in the form of a transverse partition having a central opening with abushing 11 is located in the hollow part of the case l'some littledistance back of the eye 7 or of the inner end of the bushing 8. Theopening through the bushing 11 has a'diameter which adapts saidbushing'to the articular size of thread used, and this ushing, like thebushing 8, may be changed to accommodate threads of different sizes.While the bushing 11 will permit so much of the thread to pass freely asis suitable for the product of the loom, the passage through saidbushing. is too small to admit,

the bushing offering considerable resistance, anylump or considerableenlar ement in the thread. The resistance o ered bythe bushing 11,assuming that the aforesaid lump or enlargement to enter said bushing atall, is sufficient to check the thread 9 or to cause to be imparted toit the pull necessary to sever the same, by the means and in the mannerdescribed below.

I utilize as a part ofthe cutting device thev means for putting theordinary tens on on the. thread, and such means consists of a supportmade up of two plates 12 and 13 res ec'tively affixed to opposite sidewalls of the recess in the case 1 that is between the member 10 and theeye 7 and set oif by said member, such recess being indicated by thenumeral 14, and two pair of-horizontal rods 15 aflixed to and extendingbetween said plates, a plate 16 mounted to'slide on said rods, and aspring'17 arranged between the plate 12, recess in which said eye islocated, and said plate 16. Normally the spring 17 maintains the plate16 against the plate 13, which latter is on the side of the recess 14that is opposite to the side thereof in which is the eye and the thread9 is grasped and runs ofi between said plates and has the necessarytension thereby placed on said thread.

The thread 9 asses through the bushing 11 and between the pressure ortension plates 16 and 13 on the way to the eye 7, and the course of suchthread is thus diverted from a straight to a devious path, since saidplates are located on one side of the recess 14 and said eye is locatedin the other side, while said bushing is intermediate ofsuch sides.Placed-in the recess 14 forward of the ten sion members, or between thelatter and the inner end of the bushing 8, is a. cutter or blade 18.Thus the member 10, the rods 15, and the blade are all parallel witheach other and crosswise of the shuttle case 1. The blade 18 has itscutting edge ppermost, and

closed position, WhlCh is on the same side of said 3 am ed such edgeinclines downwardly from the eye-provided side of the recess 14 towardthe opposite side'of said recess, as clearly shown in Fig.4. At thetaller end of the blade 18 there is an angularly-arranged member 19which \is securely attached to the wall of the recess 14 on'the eyeside. While the thread 9 is in the normal grasp of the tension plates 16and13, said thread passes over the adjacent part of the blade 18 to thebushing 8, and clears said blade, because the part of the blade overwhich said thread then'passes is well below the thread.

The complete operation of the device is described as follows: Theshuttle having been loaded with the bobbin, the thread 9 c from saidbobbin is carried in a direction shuttle is now ready to be placed 1nthe loom and the thread ready to have the end of the same that protrudesfrom the eye 7 connected with the work. The thread being thus connectedis paid out each time the shuttle is thrown. The thread 9 in passingthrough the recess 14, from the bushing 11 to the bushing 8, follows thedevious or indirect course that leads between the plates 13 and 16, whenthe latter plate is in normal position-see Fig. 1. The spring 17 isstrong enough to maintain the plate 16 in with the thread 9 between saidplate and the plate 13, so long as the thread is paid off in a free andnormal man The instant, however, that the free delivery) of the threadstops, as when the thread ecomes tangled upon the bobbin, or the rearend entrance to the bushing 11 encounters a lump, as 20 in Fig. 5 thethread 9 in the recess 14 is straightened and in the act ofstraightening overcomes the resistance of the spring 17 and forces theslidin plate 16 away from the fixed plate 13. By ins act the path of thethread between the bushings l1 and 8 becomes more nearly direct andleads over the higher part of the blade 18, or the part of said bladethat is in such path, so that said thread, in straightening out in themanner above explained, passes laterally into contact with said bladeand s cut, as represented in Fig. 5. The thread is thus severed inseason and at a place to avoid damage to the goods. The s ring 17 closesthe plate 16 as soon as thet read is cut. The obstructing cause is nowremoved and the shuttle and thread are again made teamed ready for thecontinuance of the weaving operation. I 7

Any unusual pull or strain on the thread is sufficient to cause thethread to be severed with this device, the pull or strain required toproduce this result being much less than would be necessary to break thethread by a longitudinal pull, or in other words, to snap or rendasunder the thread.

When a shuttle is provided with this attachment or device, the goodswoven with the filling thread from such shuttle as the weft thereof areinsured against damage from or impairment by tangles, lumps, and otherimperfections, of a more or less similar nature, in or on such threadthat might otherwise get into said goods, or be the means of damagingthem in other ways. This is true because the tangle, lump, or otherobstruction on the thread, that is of sufiicient size to damage thegoods or cause the same to be damaged, is of sufficient size to catch inthe bushing 11 and so cause the thread to be automatically severed andthe shuttle to run free.

Various changes and alterations in the shape, size, construction, andarrangement of some or all of the parts of the device may be madewithout departing from my invention, and I do not, therefore, limitmyself to the precise details set forth herein and herewith, but seek toembrace such changes and alterations within the scope of the appendedclaims.

In connection with the foregoing, it should be observed that it iconceivable the several parts of the device might be united in such amanner or assembled in such a form that a unitary attachment would beproduced for incorporation with the shuttle, instead of attaching theparts separately to the shuttle.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, in a device of the class specified of a shuttle casehaving an eye, and provlded with a threadeguiding member back of sucheye, a yielding tension member for said thread, said tension memberbeing arranged normally to divert said thread from an approximatelydirect course between said first-mentioned member and said eye, andadapted to be actuated to permit said thread to take said approximatelydirect course when said thread is checked, and a severing implement inthe aforesaid approximately direct course of the thread.

2. The combination, in a device of the class specifiechwith a shuttlecase provided with an eye, of a thread guide and stop member in saidcase, said member being pierced for the passage of thread whichis freefrom enlargements over a predetermined size, a yielding tension memberfor said thread, said tension member being arranged normally to divertsaid thread from an approximately direct course between saidfirst-mentioned member and said eye, and to be actuated to permit saidthread to take said approximately direct course, when the thread ischecked by said guide and stop member, and a severing implement in theaforesaid approximately direct course of the thread.

3. In a thread-cutting device for shuttles, a shuttle case having aneye, a transverse cutting implement behind said eye, and yielding meansarranged behind said implement normally to divert the thread from anapproximately direct course leading to said eye, such means beingadapted to be actuated by said thread into such course, when the threadis subjected to a sudden pull, to permit the thread to come into contactwith said implement.

4. In. a thread-cutting device for shuttles, a shuttle case having aneye, a transverse cutting implement behind said eye, yielding meansbehind said implement, and a perforated thread guide and stop, behindsaid tension means, to pull on the thread, when an enlargement thereonwhich is too great to pass freely through said member is encountered bysaid member, said tension means being then adapted to yield to permitsaid thread to come into contact with said implement.

5. The combination, in a device of the class specified, with a recessedshuttle having an eye opening through one side adjacent to the outerendvthereof, of a blade, yielding tension means, and a perforated guideand stop member arranged in the order named, transversely in the recessin said case, behind said eye, said blade having a cutting edge thatinclines downwardly from the end of the blade that is on the side ofsaid recess in which the eye is located, said tension means comprising aspring-pressed plate normally located adjacent to the low part of saidblade, and the perforation in said guide and stop member being in offsetrelation to the normal position of said. plate.

6. The combination, in a device of the class specified, with a recessedshuttle case having an eye opening through one side adjacent to one endthereof, of a perforated guide and stop member across the recess in saidcase, a support in said recess between said member and said eye, aspringpressed plate mounted on said support and normally contiguous tothe side of said recess which is opposite to that in which said eye islocated, and a transverse blade in said recess between said support andsaid eye, said blade having an inclined cutting edge with the low partadjacent to said plate when in normal position, and the per- I tamponmally disposed.

:7. The combination,

in a device of the 5 class specified, with a shuttle case, of a cuttinoperated implement, tension "means for the" threa such means beingadapted to be by an unusual pull on said thread to permit the latter toencounter said 1mplement, and a fixed perforated member 10 through whichsaid thread extends in order to produce the all necessary to operatesaid tension means or the aforesaid purpose.

, JQSEPH P. MORISSETTE 1 Witnesses:

OSCAR O. LAMONTAGNE ALFRED O. FAIRBANKS.

